coffin



(No Model.) 2 Sheets-Sheet 1.

'J. COFFIN.

APPARATUS FOR TOUGHENING STEEL BARS N0. 399,381. Patented Mar. l2, 1889.

N` PETERS. Fmm-Lmwgmpner. wnshmgmn. D c.

(No Model.) 2 Sheets-Sheet 2.

J. GOPPIN.

APPARATUS FOR TOUGHENING STEEL BARS.

No. 399,881. Patented Mar. 1 1889.

O O O O 0 O O O O r pending limbs a o, of the bracket=stands A A are furnished at their extremities with a pair of bosses, a', formed so that their axial perforations will be adapted to receive the ends of the parallel shafts C C and support them.

The shaft C is :intended to have a revolubl/e movement in the bosses c', that serve as boxes, and in order to give such a motion a sprocket-wheel, b, is located on the shaftnear one end or adjacent to the boss u', this sprocket-wheel being pinned or keyed to the shaft, as shown at b', Fig. l. Q

On the body of the shaft C a suitable num ber of round hubs or short cylinders, c, are affixed at spaced intervals, the central portion, cof these hubs having increased diameter, as shown in Figs. l and rlhe shaft C is located parallel and near to the shaft C and rigidly secured in its supporting-bosses. Upon its body, directly opposite the hubs c, a series of loose hubs, c', of similar diameter to the hubs c, are secured from endwise displacement by the collars c3, which latter are attached rigidly tothe shaft C', so as to permit the hubs c to revolve freely. Upon the bottom of the bosh B, near the sides and a suitable distance from each end, as shown in Fig. 2, two pairs ot.' depending bracket-lugs, j', are affixed, each of these lugs being bifurcated to form parallel jaws, as shown in Fig.

On each side of the bosh B secured upon a proper foundation. These are designed to give support to two transverse rock-shafts, F, which have the crank-arms E mounted on and secured to them near each end, so as to permit a pivotal engagement of the outer en ds7 g, ot' these cranks with the forked bracket-lugs f, between the parallel jaws of which they are located. About midway between the crank-arms E the cranks G are affixed to the rock-shafts F. These latter- .named cranks are located at right angles to vhe other cra1'1k-arms, E, and project vertically downward when the latter-named cranks lie in a horizontal plane. The two pairs of erankarms E are located in parallel planes, so that when the lower cranks, G G, are connected by a link-bar, ll, pivoted to the lower extremities of these cranks, a vertical reciprocating movcment may be given to the bosh B by a hori` zontal reciprocation of the link-bar. Then the bosh is lowered, it will occupy a relative position with regard to the parallel shafts C C', as shown in the dotted lines y y y. (See Fig. 2.)

At one ,end of the bosh B, and preferably the end where the sprocket-wheel b is attached to the shaftC, an actuating bar or rod, l, is attached to one of the cranks G, which bar may be connected to any proper mechanism to give it a limited endwise movement, and thus raise or lower-the bosh aproper distance, as may be required. Upon the sprockct-wheel b an endless chain, J, is placed, and it has engagement with a mating sprocket-wheel, (not showin) the latter beingl located on a shaft conr l l the boxes (Z are K nected to a source of power and motion, so that a movement of the chain may be effected to rotate the wheel.

At each end of thc bosh B two projecting blocks, e e, are fastened. rlhese are spaced a sufficient distance apart to have a sliding engagement with the parallel side edges, e', of the bracket-stands A A', and thus be adapted to prevent side oscillation of the bosh when it .is moved by the rocleshafts Fand attached mechanism.

Beneath the parallel shafts C C a spraypipe, l), is placed which extends nearly the length of the bosh l5, and is supported near thc'bottom. of the latter. This pipe is perforated on its upper surface to permit the escape of water or other cooling-liquid in numerous forcible jets upwardly against the axle-surface when the latter is placed on the revolving cradle above said pipe. One of the ends of the spray-pipe D is secured to the branch pipe D,which extends through the side of the bosh, and to the outer end of the branch pipe a exible pipe, D2, is attached, which is of a proper length to allow it to have a connection of its outer end with an adequate source of water-supply, whereby water may be introduced in proper volume into the bosh. An outflow-orifice, on, (see Fig. 2,) allows the yheated water which rises to escape from the boshn ear its upper edge.

In order to vfacilitate the working of the apparatus hereinbefore described, the upper end of the boshy B maybe located near the surface of the floor or ground or level of the building' in which the device is placed. To effect this a walled excavation is made, of sufficient capacity to allow the bosh to be lowered in it. The boxes d of the rock-shafts F are located on this wall, which will afford them a stable foundation. The margin of walled excavation is shown at .ce in Fig. 2.

In operation the bosh is filled with water or other suitable liquid and the rotating mechanism set in motion, the shaft C revolving' toward the fixed shaft C, the axle, which has been rendered sufficiently hot throughout its entire length, being placed upon the cradle formed by the hubs c c, which will instantly communicate a rapid rotary motion to the-axle in a direction at right angles to its axis. The water trough or bosh B is now raised until the axle is entirelysubmerged, the water thus displaced escaping at the overflow m, andthe water may be turned into the spray-pipeD to cause jets to impinge upon the rotating axle. When a surface-chill has been communicated to the axle-body to render its outer surface black, and which in the judgment of an expert operator will have penetrated the body of the axle to a sufficient depth, the axle is removed and vbosh lowered and another axle placed in position, when the operation may be repeated, it being understood that the axles as they are removed from the bosh are placed where they will be supported level, and notin contact with wet ground or other damp sur- IOO IOS

faces that would have a tendency to cool the axle unevenly and possibly warp it.

It is evident that slight changes might be resorted to in the 'form and arrangement of the several parts described without departing trom the spirit and scope of my invention, and

heuce I (lo not desire to limit myself to the mechanism for raising the eontainerup to the cradle, substantially as set forth.

3. The combination,with a frame and a stationary cradle carrying a rotating mechanism, of a vertically-movable bosh of water beneath the rot-ating mechanism, and means for raising this bosh until the rota-ting mechanism is submerged bythe water therein, substantially as set forth.

4. The combination, with a supportingframe and a stationary cradle carrying an axle-rotatin g mechanism, of a vertically-mov able bosh, means for raising the lat-ter until its contained water submerges the axle on the revolving mechanism, and a spray-pipe to cause jets to impinge upon lthe axle, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOHN COFFIN.

lVitnesses:

A. MONTGOMERY, S. G. NOTTINGHAM. 

